Optomechanical manipulation of nanoparticles with a magnetic response in a Gaussian beam

Авторы: Kislov Denis A., Shalin Alexander S.
Сборник: American Institute of Physics Inc
Том: 2300
Год издания: 2020
Издательство: Australian Institute of Physics
Местоположение издательства: Australia
DOI: 10.1063/5.0031717
Аннотация: Nanoparticles made from dielectric materials with a high refractive index have caused a surge of interest and have been proposed for various all-dielectric nanophotonic applications. In this regard, the development of optical manipulation technology for such nanoparticles becomes an important task. High-index nanoparticles support electric and magnetic multipole responses in the visible wavelength range, and interference between such modes can manifest itself in optical forces. Here, we present a study of the optical forces acting on silicon nanoparticles in a Gaussian beam, calculated analytically using the Mie theory, as well as the numerical simulations results based on the Maxwell stress tensor. We have shown that the interaction of a laser beam electromagnetic field with electric and magnetic dipoles in a nanoparticle can lead to a possible anti-trapping effect. This behavior of the particle is not typical for optical tweezers, where the particle is usually attracted to the beam axis. © 2020 Author(s).
Добавил в систему: Шалин Александр Сергеевич

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